1. The Effects of Tobacco Use
Why should you avoid cigarettes?
Cigarettes contain 43 known carcinogens, including cyanide, formaldehyde, and arsenic.
They also contain poisonous chemicals used in insecticides, paint, toilet cleaners, antifreeze, and explosives.

2. Lesson Objectives In this lesson, you’ll learn to:
Describe the harmful substances contained in tobacco and in tobacco smoke.
Examine the harmful effects of tobacco use on body systems.
Analyze the harmful effects of tobacco, such as physical, mental, social, and legal consequences.

3. Tobacco Use—A Serious Health Risk
Nicotine
One of the reasons that tobacco users find it difficult to quit is that tobacco contains an addictive drug.
All tobacco products contain nicotine.
Nicotine is classified as a stimulant.
It raises blood pressure, increases heart rate, and contributes to heart disease and stroke.

4. Cigarette Smoke—A Toxic Mixture
Toxic Tobacco
Not only is tobacco addictive, but the smoke from burning tobacco is toxic.
In 1992 the Environmental Protection Agency classified environmental tobacco smoke, or secondhand smoke, as a Group A carcinogen.
Other compounds in tobacco smoke are tar and carbon monoxide.

5. Cigarette Smoke—A Toxic Mixture
Tar
Tar penetrates the smoker’s respiratory system and destroys cilia that line the upper airways and protect against infection.
It damages the alveoli, or air sacs, which absorb oxygen and rid the body of carbon dioxide.
It also destroys lung tissue, making the lungs less able to function.

6. Cigarette Smoke—A Toxic Mixture
Carbon Monoxide
Carbon monoxide replaces oxygen in the blood, thereby depriving the tissues and cells of oxygen.
It also increases the risk of high blood pressure, heart disease, and hardening of the arteries.

7. Harmful Effects of Pipes and Cigars
Cigars contain significantly more nicotine and produce more tar and carbon monoxide than cigarettes do.
One cigar can contain as much nicotine as a pack of cigarettes.
Pipe and cigar smokers have an increased risk of developing cancers of the lip, mouth, and throat.

8. Harmful Effects of Smokeless Tobacco
Why You Shouldn’t Use Smokeless Tobacco
Smokeless tobacco delivers both nicotine and carcinogens to the body at two to three times the amount delivered by a single cigarette.
Smokeless tobacco irritates the mouth’s sensitive tissues, causing leukoplakia.
Cancers of the throat, larynx, esophagus, stomach, and pancreas are also more common among users of smokeless tobacco.

9. How Tobacco Affects the Body
Short-Term Effects of Tobacco Use
Changes in Brain Chemistry
Increased Respiration and Heart Rate
Dulled Taste Buds and Reduced Appetite
Bad Breath and Smelly Hair, Clothes, and Skin

10. How Tobacco Affects the Body
Long-Term Effects of Tobacco Use
Chronic Bronchitis
Emphysema
Lung Cancer
Coronary Heart Disease and Stroke

11. How Tobacco Affects the Body
Chronic Bronchitis
Repeated tobacco use can damage the cilia in the bronchi until the cilia no longer function.
This leads to a buildup of tar in the lungs, causing chronic coughing and excessive mucus secretion.

12. How Tobacco Affects the Body
Emphysema
This is a disease that destroys the tiny air sacs in the lungs.
The air sacs become less elastic, making it more difficult for the lungs to absorb oxygen.
A person with advanced emphysema uses up to 80 percent of his or her energy just to breathe.

13. How Tobacco Affects the Body
Lung Cancer
When the cilia in the bronchi are destroyed, extra mucus cannot be expelled.
Cancerous cells can grow in these conditions, block the bronchi, and move to the lungs.
Unless detected early, lung cancer causes death.

14. How Tobacco Affects the Body
Coronary Heart Disease and Stroke
Nicotine constricts blood vessels, which cuts down on circulation, or blood flow.
Nicotine also contributes to plaque buildup in the blood vessels, which can lead to hardened arteries, a condition called arteriosclerosis.
Arteries may become clogged, increasing the risk of heart attack and stroke.

15. Other Consequences Serious Consequences for Teens
Legal consequences: Schools prohibit the use of tobacco products on school property, and a student may be suspended or expelled for breaking these rules.
Social consequences: Many people find secondhand smoke and the smell of tobacco offensive, so tobacco users may be excluded from social gatherings.
Financial consequences: Someone who smokes a pack of cigarettes a day can spend more than $2,000 each year just on cigarettes.

16. Q. The addictive drug found in tobacco leaves is called ___________.
Quick Review
Choose the appropriate option.
Q. The addictive drug found in tobacco leaves is called ___________.
nicotine
tar
carcinogen
leukoplakia

17. A. The addictive drug found in tobacco leaves is called nicotine.
Quick Review - Answer
A. The addictive drug found in tobacco leaves is called nicotine.
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18. Q. Why is nicotine harmful?
Quick Review
Provide a short answer to the question given below.
Q. Why is nicotine harmful?
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19. Quick Review - Answer
A. Nicotine is harmful because it raises blood pressure, increases heart rate, and contributes to heart disease and stroke.
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20. Q. List the short-term and long-term effects of tobacco use.
Quick Review
Provide a short answer to the question given below.
Q. List the short-term and long-term effects of tobacco use.
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21. Quick Review - Answer
A. The short-term effects of tobacco use are changes in brain chemistry, increased respiration and heart rate, dulled taste buds and reduced appetite, bad breath, and smelly hair, clothes, and skin.
The long-term effects of tobacco use are chronic bronchitis, emphysema, lung cancer, coronary heart disease, and stroke.
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22. Quick Review Provide a suitable analysis.
Analyze the harmful effects of tobacco, such as physical, mental, social, and legal consequences.

23. Tobacco Use—A Serious Health Risk
Nicotine
One of the reasons that tobacco users find it difficult to quit is that tobacco contains an addictive drug.
All tobacco products contain nicotine.
Nicotine is classified as a stimulant.
It raises blood pressure, increases heart rate, and contributes to heart disease and stroke.
An addictive drug is a substance that causes physiological or psychological dependence.

24. Tobacco Use—A Serious Health Risk
Nicotine
One of the reasons that tobacco users find it difficult to quit is that tobacco contains an addictive drug.
All tobacco products contain nicotine.
Nicotine is classified as a stimulant.
It raises blood pressure, increases heart rate, and contributes to heart disease and stroke.
Nicotine is the addictive drug found in tobacco leaves.

25. Tobacco Use—A Serious Health Risk
Nicotine
A stimulant is a drug that increases the action of the central nervous system, the heart, and other organs.
One of the reasons that tobacco users find it difficult to quit is that tobacco contains an addictive drug.
All tobacco products contain nicotine.
Nicotine is classified as a stimulant.
It raises blood pressure, increases heart rate, and contributes to heart disease and stroke.

26. Cigarette Smoke—A Toxic Mixture
Toxic Tobacco
A carcinogen is a cancer-causing substance.
Not only is tobacco addictive, but the smoke from burning tobacco is toxic.
In 1992 the Environmental Protection Agency classified environmental tobacco smoke, or secondhand smoke, as a Group A carcinogen.
Other compounds in tobacco smoke are tar and carbon monoxide.

27. Cigarette Smoke—A Toxic Mixture
Toxic Tobacco
Not only is tobacco addictive, but the smoke from burning tobacco is toxic.
In 1992 the Environmental Protection Agency classified environmental tobacco smoke, or secondhand smoke, as a Group A carcinogen.
Other compounds in tobacco smoke are tar and carbon monoxide.
Tar is a thick, sticky, dark fluid produced when tobacco burns.

28. Cigarette Smoke—A Toxic Mixture
Toxic Tobacco
Not only is tobacco addictive, but the smoke from burning tobacco is toxic.
In 1992 the Environmental Protection Agency classified environmental tobacco smoke, or secondhand smoke, as a Group A carcinogen.
Other compounds in tobacco smoke are tar and carbon monoxide.
Carbon monoxide is a colorless, odorless, and poisonous gas.

29. Harmful Effects of Smokeless Tobacco
Why You Shouldn’t Use Smokeless Tobacco
Smokeless tobacco delivers both nicotine and carcinogens to the body at two to three times the amount delivered by a single cigarette.
Tobacco that is sniffed through the nose, held in the mouth, or chewed is called smokeless tobacco.
Smokeless tobacco irritates the mouth’s sensitive tissues, causing leukoplakia.
Cancers of the throat, larynx, esophagus, stomach, and pancreas are also more common among users of smokeless tobacco.

30. Harmful Effects of Smokeless Tobacco
Why You Shouldn’t Use Smokeless Tobacco
Smokeless tobacco delivers both nicotine and carcinogens to the body at two to three times the amount delivered by a single cigarette.
Smokeless tobacco irritates the mouth’s sensitive tissues, causing leukoplakia.
Cancers of the throat, larynx, esophagus, stomach, and pancreas are also more common among users of smokeless tobacco.
Leukoplakia refers to thickened, white, leathery-looking spots on the inside of the mouth that can develop into oral cancer.

31. Quick Review - Answer
A. Correct! The addictive drug found in tobacco leaves is called nicotine.
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32. Quick Review - Answer
You have answered the question incorrectly. Go back to try again, or click Next to view the correct answer.